Perhaps you should try some spelling variations:
thuc dang » thuoc dang, thuc dan, thuc dung
nham thuc » nhan thuc, nam thuc, nham thu
dang tinh » dang dinh, dang sinh, dang vinh
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
vi su » ve su, ki su, oi su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu van nham thuc dang tinh ((vi su) OR (va su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu van nham thuc dang tinh ((vi su) OR (va su)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van nham thuc dang tinh ((vi su) OR (va su)) triet*.